Final answer:
In laptop computers, the 1.8 inch and 2.5 inch form factors are commonly used for SSDs. The 2.5 inch SSD is prevalent due to its widespread compatibility, while the 1.8 inch is used in ultraportable laptops.
Step-by-step explanation:
The SSD form factors commonly used in laptop computers are the 1.8 inch and 2.5 inch sizes. These form factors refer to the physical size of the solid-state drives, which are designed to fit within the compact environments of laptops. The 2.5 inch SSD is the most prevalent due to its compatibility with the space and connectors that were previously used for traditional HDDs. On the other hand, the 1.8 inch SSDs are less common but are used in ultraportable laptops where space is at an even greater premium.